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Need Wiring Advice...new Alternator, New Wiring Harness, New Motor In 67 Cj5

Discussion in 'Early CJ5 and CJ6 Tech' started by jeraldt, May 13, 2021.

  1. May 13, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    So I am in the final stages of a nut and bolt restoration of a 67 CJ5 for my wife. Went back to a 225 dauntless, complete new wiring harness, and a new ACDELCO3342209{#19135767}Gold / Professional; Remanufactured; 55 Amp alternator. I have lots of experience with most all of the wiring except alternators (because I hate dealing with them for some reason). When I bought the alternator, I thought it was a 1 wire and it would be cake to wire up, but now I dont know and the online wiring resources for this alternator are crap. This model alternator is the the actual unit shown for this year make and model of Jeep. Can anyone tell me the proper way to wire this little bugger so I can move on to my shakedown cruise. Its been a long time in the making.
     
  2. May 14, 2021
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Show us the alternator. Post a pic.

    You probably meant "new to you" but remanufactured is not new. It's built from parts of old alternators put together with some new parts.

    If it's this one ACDELCO 3342209 Alternator / Generator | RockAuto it's a Motorola. Delco brand does not mean it's a Delco alternator. This is simply a replacement for the factory alternator.

    You would use the factory wiring diagram to wire it. You'll need a regulator, because it's very much not a one-wire alternator.
     
    Last edited: May 14, 2021
  3. May 14, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    Pics attached, sorry I forgot those. There are arrows on the back of the alt, but I am not 100% sure how to connect them. The wiring harness I have does have an exciter wire if I need that, but I am not familiar with all the alternator terminology. Thanks for the help. I am 100% a rookie when it comes to alternators
     

    Attached Files:

  4. May 14, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    Feb 13, 2018
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    Thanks Tim. Wondering if I would be better off just getting a 1 wire alternator in the end. Now is the time because I am doing all of the wiring and trying to keep the engine bay as clean as possible. Thoughts or suggestions on a better choice for alternator?
     
  5. May 14, 2021
    Bigdaddy13

    Bigdaddy13 Member

    So.Cal
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    Nov 19, 2019
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    With all the research i've done - a 1-wire or 2-wire is probably the way I'll go on mine.
     
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  6. May 14, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    Do you know of a good 1 wire that will work on the early CJs? Mine is titled as a 65, but I refer to it as a 67 in conversation because the 225 is native to the 67.
     

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  7. May 14, 2021
    Bigdaddy13

    Bigdaddy13 Member

    So.Cal
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    Delco 10SI or 12SI that is internally regulated. All you should need is the wire from the back of the alt to the top post on the starter solenoid (same post as the battery cable) and then a sensing wire on something like the horn circuit, depending on your wiring setup, which will help you get the most out of your alternator)

    i’m working on finding a good part# at O’reillys (my preferred FLAPS)
     
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  8. May 14, 2021
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    Just take a look at the SI type Delco alt for the one you like. The SI means systems integrated which means internal regulated. If you are wanting to use the alt/gen indicator bulb in the speedo housing you need to get the 2 wire type.
     
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  9. May 14, 2021
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    To substitute a 10SI for the Motorola, you'll need to either buy a one-wire alternator specifically sold as a replacement for a Motorola alternator (Summit Racing among others), or buy a 10SI for a GM car and modify the alternator case to fit. I think all you have to do is shorten the cast bolt hole across the top with a hacksaw. of course, this will void any warranty you get with the part.

    The GM car 10SI will be a three-wire connection. You can either wire it for three wires (easy IMO) or buy new internal parts to convert it to one-wire. These parts are available on Amazon, among other places.

    NB this topic has been covered a lot here and on other forums and web sites. You can't expect us to go over and over this ... it's up to you to read old posts and learn about this topic. Lots of good info on the Mad Electrical site.
     
    Last edited: May 14, 2021
  10. May 14, 2021
    John Gedde

    John Gedde Been around the block once or twice...

    Middle Island, NY
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    A 10SI bolted right onto my Dauntless. I used one from a 1985 Buick Skylark. I may have had to reclock the case to get the mounting tang to be where it needed to be, but that's easy if you know the paper clip/brush trick. Look for two small holes in the back of the alternator. Stick two straightened paperclips in each hole to hold the brushes back. Now you can remove the 4 long screws holding the front and back half together and reclock it however you need it to be. Pull out the clips and you're golden.

    There's a two pin connector that goes with it which you can get at any LPS. One wire on the connector is red, the other is white.

    https://www.amazon.com/ACDelco-PT22...s=gm+alternator+pigtail&qid=1621009417&sr=8-3

    Wiring is simple:
    The white wire goes through your "AMP" light to switched power (don't connect it directly to switched power else you'll cook the VR - it has to go through a bulb or a resistor.)

    The red wire connects to the output terminal on the back of the alternator along with the alternator output which goes to the starter motor main power connection through 8 AWG wire - although you can use 10 AWG. I covered the main charging wire with fabric loom as additional protection since it's an unfused circuit. The red wire (VR sense lead) is best if it goes right to the battery, but there should be so little drop through your main starter cable and your 8 (or 10) AWG charge wire, that it'll still accurately measure battery voltage. You really don't want to connect it too far downstream in your unswitched wiring else voltage drop due to loads being drawn through that will raise the alternator output voltage. In short the red wire is used so that the VR knows what the battery voltage is for charging purposes. The key word is battery voltage...

    I've had mine hooked up this way for 25 years and it charges well after an initial rev to get the VR started. Not sure why that is. My theory is that the "AMP" light bulb, being so small, doesn't give enough voltage to the regulator to kick it off from the start. BTW, the white wire is cleverly used by GM as both a charge light driver and a switched to pre-power the VR so it'll have power to charge right from the start.

    John
     
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  11. May 14, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    Thank you John. Great information and clear instructions. Very much appreciated!
     
  12. May 14, 2021
    elawson

    elawson New Member

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    Did you get the regulator with the alternator?

    Alternator Installation on CJ3B.info

    Part way down the linked page has a diagram for the Motorola alternator to regulator wiring. The pictures in the prior post agree with the sticker on the back of the alternator agrees with the the stuff in the linked page.

    I've always seen the regulators used with those alternators have those three color wires and get connected as indicated.
     
    Last edited: May 14, 2021
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  13. May 15, 2021
    jeraldt

    jeraldt Member

    Spokane Wa
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    I ended up making some calls around town and located a great guy in post falls idaho, about 15 minutes from me. He is almost 84 years old and a genius in alternators. It was such a pleasure talking with him and just soaking up a tiny bit of his experience and knowledge. I told him what I was trying to do (a 1 wire alternator on a 67 CJ5, and he asked me if I had a few minutes and he would build me one up right quick. 10 minutes later he came out with exactly what I needed. Fits perfectly and it was a 1 wire installation. It was a blast just being around Bill. I think he only does it for the company and to talk cars, and help the hot rod community, Not sure if he ships out of not, but its Astro Electric in Post Falls ID. The owner is Bill and he is a real gem of a man. Have a new alternator and a new friend too.
     
  14. May 16, 2021
    elawson

    elawson New Member

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    I live near Phoenix, AZ and at one time there was a business called PGE (Phoenix Generator Exchange). It sounds like the two companies had the same outlook on customer service.

    PGE is no longer around....unfortunately....
     
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